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Influence of Grade of Parent Concrete on Properties of M30 Grade Recycled Aggregate Concrete

Author(s):

Katari Ravi , Viswanadha Institute of Technology and Management; Y Mahesh, Viswanadha Institute of Technology and Management

Keywords:

Recycled Aggregate, Natural Aggregate, Two Stage Mixing Approach, Compressive Strength, Csaggregate Index

Abstract

This research investigates the influence of Grade of Parent Concrete on the physical and mechanical properties of Recycled Aggregates and Recycled Aggregate Concrete. Various grades i.e., M20, M25, M30, M35 and M40 were selected as parent concrete. Cubes of Parent Concrete were crushed in laboratory using a Jaw Crusher. Ordinary Portland cement, Natural Sand, Natural Coarse Aggregate and Recycled Aggregates were used as materials for Recycled Aggregate Concrete. Two stage Mixing approach (TSMA) is adopted for better performance of Recycled Aggregate Concrete. Water – Cement (w/c) ratio is kept constant at 0.45 for all recycled aggregate concrete mixes. The recycled aggregate concrete specimens are tested for 7 and 28 days. The present research assesses the cement mortar remains and categorizes the recycled aggregate using a classification system called CSAggregate index ranging from 0 to 100. CSAggregate index result shows that the adhered mortar increases with increase in grade of parent concrete. The physical and mechanical properties of recycled aggregates are lower than natural aggregates. Recycled aggregate concrete can achieve compressive strength of natural aggregate concrete.

Other Details

Paper ID: IJSRDV5I120388
Published in: Volume : 5, Issue : 12
Publication Date: 01/03/2018
Page(s): 680-687

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